Radiodynamic directive control system.



J; H. HAMMOND, JR. RADIODYNAMIC DIREGTIVB CONTROL SYSTEM.

APPLICATION FILED DEG.15,1918.

1,115,530. Patented Nov. 3, 1914.

JOHN HAYS HAMMOND, .13., or GLOUCESTER, messacnosn'rrs.

vRADI [OID'YIilAlVIIC DIRECTIVE CONTROL SYSTEM.

Specification of Letters Patent.

Patented Nov. 3, 1914.

Application filed December 15, 1913;. Serial No. 806,674.

To all whom it may concern Be it known that 1, Joan HAYS HAM- MOND, Jr.,a citizen of the United States,

and a resident of Gloucester, Massachusetts, have invented anImprovement in Radiodynamic Directive Control Systems, of which thefollowlng description, in connection with the accompanying drawings, isa specification, like characters on the drawings representing likeparts.

This lnvention relates to radiodynamic directive control systems, andparticularly to a system for indicating visually or 1n similitude the:location of a body, wh ch body is preferably a movable one and WlllCllmay be a vessel.

In order that the principle of the invention may readily be understood,I have disclosed a single embodiment thereof in the accompanyingdrawing, wherein:

Figure 1 isia diagrammatic representation of one embodiment of means forpractising.

the invention; and Fig. 2 is a diagram indicating a position of themoving body and of means responsive to radiant energy for indicating theposition of said body.

In accordance with my invention, I provide suitable means for indicatingvisually or in similitude or miniature the location of a body which ispreferably a moving one,

such for example as a torpedo or other vessel. The invention may,however, be adapted to other uses and for the purpose of indicating,preferably to the eye, the location of an object the position of whichmay change from time to time and which may be concealed from the eyes ofthose desiring to know the position thereof. Preferably I take advantageof signals transmitted or emitted from said body. Obviously the body tobe located may be a vessel manned by a crew and which can transmitelectromagnetic waves to be received by a distant control station.- Thesignals may, however, be otherwise originated and may partake of anyform of radiant energy. In the case of a torpedo which has been sent outfrom a control station or ship, the signals may be automaticallygenerated in any suitable manner. For example, sound signals mayautomatically be generated from time to time upon the torpedo, and bysuitable mechanism thereon be caused to act 'upon mechanism fortransmitting electromagnetic waves so that upon the generation of eachsignal suitable electromagnetic waves are transmitted.

I shall describe that form of my invention wherein electro-magneticwaves are transmitted from a torpedo which may 'be enveloped in fog orthe position of which, for

other reasons, cannot readily be detected by an observer.

Referring more particularly to the drawmg, I have in Fig. 2 indicatedshore lines at 1 and 2, a body of water at-3, and a torpedo at 4, theposition of which is to be indicated in similitude or miniature.Prefcrably at two points, 5 and 6, I position receiving apparatus forelectromagnetic waves. fFreferably such apparatus 15 one for direc--t1vely receiving such waves and may be of the type devised by Messrs.Bellini and Tosi, one form whereof is set forth in their United StatesPatent No. 9%,440, dated January 4, 1910. Each receiving apparatuspreferably 1s provided with two fixed coils diagram.- maticallyindicated at 7, 8 and 7 8 and a thlrd coil at 9, 9. It isunnecessary toindicate in detail all parts of said apparatus or to set forth fully theaction thereof. It- IS sufliclent to state that when the electromagneticwaves or signals from the torpedo 4 reach the two receiving stations,oscillating currents are produced in the coils 7, 8 and 7 8. Theseoscillations compound to form a single magnetic field with a directionperpendicular to that from which'the waves come. The strength of theinduced current in the movable coils 9, 9' will depend upon itsorientation with respect to the resultant magnetic field and will be ata maximum'when'the said movable coils are respectively in a position toembrace as many as possible of theilines of magnetic force. This optimumdirection is perpendicular to the field and therefore parallel to thedirection from which the waves are coming. Therefore, the said movablecoils will, upon the receipt of electromagnetic waves, be

turned to point toward the torpedo 4.

At some suitable point I preferably provide a chart or representation 10of the field of movement of the torpedo 4:, and upon or in suitablerelation thereto, I mount or provide suitable means to indicate upon thechart the position of the torpedo 4. For this purpose I preferablyprovide two pointers,

ivote fa suitable-points, of the chart.

fBreferably' 't "e said ipointers are. symmetricall mounted; and fihaveherein represented-them as inounte'd atjpoin ts erpilall 'dlstant.therespective gdj t vertical ,e g of. e charl; v V

Eafh pointer1 1,j 12 isiniiuencedby sit ablemeans coacting with. one ofthe receiv-' "ing'apparatus; Preferably for this'p'urpose I- providetvvoelectric circuits, one of Wl'llCh is asso iated 'withqgnd -,includes the pointer llzandv the receivinga paratus 7, 8, 9 and Lthe otheroffvvhioh-ine udes the pointer 12 to eut .out or to. addresistance tothej' circuit-17,17, The'said. circuits 1 7, 17 ."are. connected tolearthat19, 19' and are-"pro andja'thereceivin'g apparatusl, 8,';9. RAs: 7

indicated "in Figgl, eachfmovableicoil-9 or -9T '2 forms; 5} portion'ofQits; desoribed "circuit and; is, connected; ground at 16, 16-;.vEaehz -.t ':ircui't '17 1:7 1is provided-"with*afbattery 18,18,;jandlttgsuitable resistance 19 vand 19',

al'ongiivvhichythe directive coils ,9, 9' vmay move asindicated', So asin theirmovements vided with j suitable:' device s, I-such for ex?connected; thereto f in j any suitablejmanner as by meansfofsuitably'connected links 23, 24.

' The receiving devices are; mounted as de- 1 2 scribed so that theplanes'of' direction}of the movable-coils 9, y-interseet at the, torpedo4' andin moving into position determined fby, 'tl 1'e{'posi tion -of"the torpedo, they add to 'c'uits strengthens I the current therein "and 11 1", 12? downward and at their intersecting point 4", indioatetheposition of theftorpedo.

Conversely, t e addition ofgresistance "to the circuits, 17 17--leSs'ens; the current'gpass'ing'" therethrough and-hencezthe' springs-22, 22? .rn'ove the-cores 21,- 21 downwardly and thus elevate theindie-ating endsv of the pointers and "change their" point ofintersection 4;; Such change in position 'ofythecross ing] point 4 ofsaid'pointers corresponds-to the changes in position ofthe torpedo 4,and

thus the-position of said torpedo is at all times indicated visuallyupon the chart, or

representation 10, so that even though the tor edo be enveloped in fogor be submerged, or' or other reasons .be'concealed from view e cart.,and

mind of theobserver the actual the torpedo. It is not necessarythat thetude the. location of a body, abhai't 'or; 5 p- I v v .sentation of thelfield of movement them ple as so enoids j20,-' 2Q'; .the' core 21, '21:j'of whichare"provided,vvithgspringsl22, 22f 1' T ivhichi tendi ltopulli themgfdownvv'ard or to fdepr'ess''them v The currents passingthrough the said-circuits' l-7, 17f V the"said om "35 therebyv impartturning 1 movement-Ito the pointers 11 'and312, bein'gY for-this purposebody. v v

or take resistance-from the eircuitsl'l, 1:1.- Thev subt'ractionofresistance-from the 'c'1r- 'saidb'ody... y-a Q 5 In -'apparatus forjindicatingj visuall respect "to said body,. and coactingLrm ns relationto the chart or representation-to;

*oiis difiicult 0 fouo'w many,- its loationi is l times located uponthe011811110.

Obviously thet-chart or representation-may be of any suitablecharactertit being merely cdeslrable that the crossing or indicat' ,10 cpoint of the pointers -convey to the eye position of pointersbe ofsuflicient length as to actually ntersect, althoughthis is desirable.

.Having thus described one illustrative embodiment of my invention, Idesire it to .be understoodthat although specific terms are employed,they are "used in a generic} and descriptive sense and not for purpogg.,.l

of 1imitation,,the scope of the :iyyafidfih. j

ing set forth in the following la ns; v 1. 'In'apparatusforrepresentil'i g iin simili-i";

resen'tation of the field of 'movementgthereof, 7 means to indicateuponfsaid charti or.rep; resentation the position 7 of v I said'jsbodygmeans responsive toradiant ener mitted frol'n said body to'move saiindicat"-' mg means in accordance with 'movements of f said body., Y Y'2. In apparatus for representing tude'the locationiof a body,al'chartor 'repre means to indicate 1115011Said-Chrt 0l'fmp; resentationthe positionof; said body, and means responsive to signals;- from saidbody tomovesaid. indicating meansin accordance With nove ex ts-bfthe 3.In apparatus for representing-m lnimagv ture the-location of a body,-.achart or*rep.-: resentatio'nof the field of movement thereof, f v avpointer to indicate upon said: chart or representation the positionoi-the body, and 105- radiodynamic means to move saidpointer inaccordance with movements of the body; V v 4. In apparatusforrepresentingin miniagfl I ture the location of a body, a-chart orrep-j, resentation of the field ofmoveni'ent thereof," I'10 a,pointerfto indicate upon'gsaid charter-1'. representationthe positionofth'e body,- and 5 radiodynamic means 'direct ively' controlled 'by theposition of saidlb'ody;to lmovesaidf pointer in accordance .withmovements 'ofthe location-of;v abody a chart or; repr sentation otthefield-*0 :niovement' io.'f'8 body,.- means responsive. to ir'zixliainti.energy transmitted fromsaid body and positionable. thereby in; a.predetermined direction positionable by said'responsi-v'e means-Withindicate thereon thepositionjofsaid p 6. In apparatus for indicatingvisually, if

the location of a body, a chartfor representation of the fieldjof''movement .of'said body m 'eans responsive to radiant'energyls o'transmitted from -said body and positionable thereby in'zalpredetermined direction with respect to sai body, and electricall meansto indicate u on said chart or representation the position-of said body.

the location of a body, a chart :or representation of the fieldof-movement of said body, means responsive to radiant energy transmittedfrom said body and positionable thereby in a predetermined directionwith respect to said body, and coacting means positionable by saidresponsive means in parallelism to the latter and in predeterminedrelation to said chart or representation.

8. In apparatus for indicating visually the location of a body, a chartor representation of the field ofmovement of said body, means responsiveto radiant energy transmitted from said body and positionable thereby ina predetermined direction with respect to said body, a pointer mountedto travel across said chart or-representation, and operative connectionsbetween said pointer and said responsive means.

9. In apparatus for indicating visually the location of a body, a chartor representation of the field of movement of said body, meansresponsive to radiant energy transmitted from said body and positionablethereby in a predetermined direction with respect to said body, apointer mounted to travel across said chart or' representation, and anelectric circuit between and operat-ively associated with said pointerand said responsive means.

10. In apparatus for indicating visually the location of a body, a chartor representation of the field of movement of said body, meansresponsive to radiant energy transmitted from said body and positionablethereby in a predetermined direction with respect to said body. apointer mounted to travel across said chart or representation,

and an electric circuit between and operatively associated with saidpointer and said responsive means and having a resistance adapted to bevaried by said responsive means.

11. In apparatus for indicating visually the location of a body, a chartor representation of the field of movement of said body, meansresponsive toradiant energy transmitt d from said body and positionablethe e y in a predetermined direction with respec to said body, a pair ofpointers m n to travel in opposition across said Cha r presentation, andmeans controlled q responsive means to change the position o i saidpointers in accordance Wit-h changes 111 osition of said body.

I11 PP is for indicating visually the location of a ody, a chart orrepresentation of the field oi movement of said body,

actu-" ated means-controlled 'by said responsive means responsive toradiant energy transmitted from. said body and positionable .thereby in:a-predetermined direction with respect to said body, a pair of pointersmounted to-- travel in opposition across said responsive means.

,xchart or representation, and means con- 7. In apparatus.for"1nd1cat1ng. yisually 13. In apparatus for representing insimilitude the location of a body, a chart or representation of thefield of movement of said body, movable means responsive to radiantenergy transmitted from said body and thereby to be turned toward it,and ooacting means at said chart adapted to be turned by said responsivemeans into a po sition corresponding to that of the latter.

14. In apparatus for representing in sim-ilitude the location of a body,a chart or representation of the field of movement of said body, movablemeans responsive to radiant energy transmitted from said body andthereby to be turned toward it, coacting means at said chart adapted tobe turned by said responsive means into a position corresponding to thatofthe latter, and electrical connections between said responsive meansand said coa'cting means.

'15. In apparatus for representing in similitude the location of a body,a chart or representation of thefield of movement of said body, movablemeans responsive to radiant energy transmitted from said body andthereby to be turned toward it, coacting means at said chart adapted tobe turned by said responsive means into a position corresponding to thatof the latter, and an electric circuit connecting said coactingmeans andsaid responsive means and having a resistance varied in accordance withthe movements of said responsive means.

16. In apparatus for representing in similitude the location of a body,a chart or representation of the field of movement of said body, a pairof movably mounted devices responsive to radiant energy transmitted fromsaid body and thereby to be turned toward it, said devices being mountedat opposite sides of said body, a pair of pointers mounted to cross uponsaid chart, and means controlled by said responsive devices andoperatively connected to said pointers to move the latter in accordancewith movements of said responsive devices.

17. In apparatus for representing in similitude the location of a body,a chart or representation of the field of movement of said body, a pairof movably mounted devices responsive to radiant energy transmitted fromsaid body and thereby to be turned toward it, said devices being mountedso that their planes of direction may in-' tersect, a pair of pointersmounted for inof: said devices.

18. In apparatus for represent similitude the location of a body, a 0art or represe tation of the field of movement of said he y, a pair ofmovably mounted devices responsive toradlant energy transmitted fromsaid body and thereby to be turned toward it, said devices being mount-'i 'sive devices to move the former 1n accord-x mW tnesses: 1n 's1-' a;

.ed so that their planes of direction may intersect a pair of pointersmounted for 1ntersect on upon said chart, and electric 'connectionsbetween said pointers and responance with-movements of thelatter. 19. Inapparatus; for representin militude thelocation of a body, a c art prpresentation Jot; t l-Jedi i fieiitsf said .body,'.-a';pai1ji.-o:niovably unted d vices responsive :to-rrddiant-enertransmitted' from' said body andither to be turned toward it,said-devices mounted so that their planes'ofdi rectionmay intersect, apair 0 fpointers mountedcior intersec'tion upon -:s'a1d 1chart,and"electric circuitsbetween said pointers end res ns'ive devices,having res1stancesad'apte varied'by and in accordance with-theidirectiveposition of said res onsive devices.

In testimony whereo ,-I have signed my name to this specification, inthe'presenc'e of two subscribing witnesses.

' JOHN to be" HAYS HAMim n-"Jt,

